天赐湾地区长4+5、长6油层组原始含油饱和度计算方法研究  

作　　者：李鹏勃[1] 周冕[1] 高路遥 张佳磊 

机构地区：[1]延长油田股份有限公司靖边采油厂,陕西榆林718500 [2]中铁五局集团物资实业有限责任公司,西安710061

出　　处：《科技创新与应用》2024年第17期106-111,共6页Technology Innovation and Application

基　　金：延长油田股份有限公司项目(YT20KT009-19)。

摘　　要：为进一步明确鄂尔多斯盆地天赐湾地区长4+5、长6油层组原油地质储量,开展系统的原始含油饱和度计算方法研究。针对天赐湾地区长4+5、长6油层组低孔特低渗特征分别采用密闭取心分析法、压汞法(J函数)、测井解释法(阿尔奇公式)进行原始含油饱和度计算方法研究。研究结果表明,密闭取心分析法测定的研究区长4+5、长6油层组平均原始含油饱和度为46.7%;压汞法(J函数)测定的长4+5、长6油层组平均原始含油饱和度为47.5%;测井解释法(阿尔奇公式)测定的长4+5油层组的平均原始含油饱和度为51.4%,长6油层组的平均原始含油饱和度为48.7%。3种方法测得的平均原始含油饱和度偏差不大,可为研究区长4+5、长6油层组原油地质储量的计算提供重要的数据支撑。In order to further identify the crude oil geological reserves of Chang 4+5 and Chang 6 reservoirs in Tianciwan area of Ordos Basin,a systematic calculation method of original oil saturation was carried out.According to the characteristics of low hole and ultra-low permeability of Chang 4+5 and Chang 6 reservoirs in Tianciwan area,closed coring analysis method,mercury injection method(J function)and logging interpretation method(Archie formula)are used to calculate the original oil saturation.The results show that the average original oil saturation of Chang 4+5 and Chang 6 reservoirs in the study area measured by closed coring method is 46.7%.The average original oil saturation of Chang 4+5 and Chang 6 formations measured by mercury injection(J function)is 47.5%.The average original oil saturation of Chang 4+5 formation and Chang 6 formation is 51.4%and 48.7%,respectively,according to well logging interpretation(Archie formula).The average original oil saturation measured by the three methods has little deviation,which can provide important data support for the calculation of crude oil geological reserves of Chang 4+5 and Chang 6 reservoirs in the study area.

关 键 词：鄂尔多斯盆地 天赐湾 长4+5 长6 原始含油饱和度 

分 类 号：P618.13[天文地球—矿床学]